diff --git a/asm-savers.h b/asm-savers.h
index e4adf4c..701d60e 100644
--- a/asm-savers.h
+++ b/asm-savers.h
@@ -199,6 +199,22 @@ typedef struct {
     word_t* memory_size;
 } ntsys_argument_parser_t;
 
+#include <ctype.h>
+
+int __regist_ignore_strcmp(char* str1, char* str2) {
+    size_t t = strlen(str1);
+    size_t l2_len = strlen(str2);
+    size_t i = 0;
+    while (i < t) {
+        char i1 = toupper(str1[i]);
+        char i2 = toupper(i > l2_len ? '\0' : str2[i]);
+        if (i1 > i2) return 1;
+        if (i1 < i2) return -1;
+        i ++;
+    }
+    return 0;
+}
+
 static void __input_datatype(ntsys_argument_parser_t* parser, byte_t* mode) {
     ntsys_exit_if_error(parser) {
         ntsys_error("Cannot find argument!");
@@ -391,7 +407,7 @@ static int select_argument(ntsys_argument_parser_t* parser) {
         }
         strncpy(buf, table[i], t);
         buf[t] = '\0';
-        if (strcmp(str, buf) == 0) {
+        if (__regist_ignore_strcmp(str, buf) == 0) {
             char* se = &table[i][t + 1];
             while (strlen(se) > 1) {
                 char is[3];
diff --git a/ntsys b/ntsys
index 6c2aa22..4e214ff 100755
Binary files a/ntsys and b/ntsys differ